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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "third_party/blink/renderer/modules/webmidi/midi_input.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/frame/use_counter.h"
#include "third_party/blink/renderer/modules/webmidi/midi_access.h"
#include "third_party/blink/renderer/modules/webmidi/midi_message_event.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/wtf/std_lib_extras.h"
namespace blink {
using midi::mojom::PortState;
MIDIInput* MIDIInput::Create(MIDIAccess* access,
const String& id,
const String& manufacturer,
const String& name,
const String& version,
PortState state) {
DCHECK(access);
return MakeGarbageCollected<MIDIInput>(access, id, manufacturer, name,
version, state);
}
MIDIInput::MIDIInput(MIDIAccess* access,
const String& id,
const String& manufacturer,
const String& name,
const String& version,
PortState state)
: MIDIPort(access, id, manufacturer, name, kTypeInput, version, state) {}
EventListener* MIDIInput::onmidimessage() {
return GetAttributeEventListener(event_type_names::kMidimessage);
}
void MIDIInput::setOnmidimessage(EventListener* listener) {
// Implicit open. It does nothing if the port is already opened.
// See http://www.w3.org/TR/webmidi/#widl-MIDIPort-open-Promise-MIDIPort
open();
SetAttributeEventListener(event_type_names::kMidimessage, listener);
}
void MIDIInput::AddedEventListener(
const AtomicString& event_type,
RegisteredEventListener& registered_listener) {
MIDIPort::AddedEventListener(event_type, registered_listener);
if (event_type == event_type_names::kMidimessage) {
// Implicit open. See setOnmidimessage().
open();
}
}
void MIDIInput::DidReceiveMIDIData(unsigned port_index,
const unsigned char* data,
size_t length,
base::TimeTicks time_stamp) {
DCHECK(IsMainThread());
if (!length)
return;
if (GetConnection() != kConnectionStateOpen)
return;
// Drop sysex message here when the client does not request it. Note that this
// is not a security check but an automatic filtering for clients that do not
// want sysex message. Also note that sysex message will never be sent unless
// the current process has an explicit permission to handle sysex message.
if (data[0] == 0xf0 && !midiAccess()->sysexEnabled())
return;
DOMUint8Array* array =
DOMUint8Array::Create(data, SafeCast<unsigned>(length));
DispatchEvent(*MIDIMessageEvent::Create(time_stamp, array));
UseCounter::Count(*To<Document>(GetExecutionContext()),
WebFeature::kMIDIMessageEvent);
}
void MIDIInput::Trace(blink::Visitor* visitor) {
MIDIPort::Trace(visitor);
}
} // namespace blink